特殊地形条件下的城市轨道交通车辆选型

在轨道交通前期规划阶段,通常对车辆选型不做深入研究,但特殊地形条件下的车辆选型则可能对后期工程建设产生很大影响。根据贵阳市地形起伏较大的特点,在建设规划阶段运用牵引计算,对快线系统的车辆指标进行定性和定量的专题研究。从符合上位规划的角度分析并选取车辆最高速度,从适应地形条件的角度研究车辆动拖比及长大坡道的适应性。研究表明,贵阳轨道交通快线系统应选择最高速度为100 km/h的B型车;全动车及4M2T都可满足运营需要,但全动车对长大坡道的适应性更好;随着前期规划工作的深化,在后续设计阶段应进一步比较两种车型的适应性和经济性。

Vehicle Selection of Urban Rail Transit under Special Terrain Conditions

Vehicle type selection is usually not studied in depth at the early stage of planning for urban rail transit,but under special terrain conditions it may have a great influence on the follow-up construction.The traction calculation has been carried out in Guiyang urban rail network construction plans because of the mountainous terrain in Guiyang,and the analysis is made to identify the vehicle index for the rapid rail transit system.The maximum speed of the vehicle is selected from the perspective of master planning.The vehicle motor-trailer ratio and the adaptability to long steep grade are analyzed from the angle of adapting to the terrain conditions.It is concluded that for Guiyang rapid rail transit system,vehicle B with the maximum speed of 100km/h should be chosen;all-motor vehicles and the 4M 2T vehicles can meet the operational needs,but the adaptability of all-motor vehicles on the long steep ramp is better.The adaptability and economy of the two models should be further compared in the follow-up stage of design.